SIG Sauer MCX Virtus

GunCritic Score

Critic Rating

User Rating

1 Reviews



Used Price:


Sale Price:


SIG Sauer MCX Virtus Gun Stats

SIG Sauer MCX Virtus

Want to Sell Your Gun?

Get Instant Offer
Conceived for the demands of the Special Operations community, the MCX VIRTUS from SIG SAUER is engineered for adaptability, accuracy and longevity. Cold hammer-forged 16” barrels are user-changeable and available in 5.56 NATO and 300 BLK, offering the utmost in mission-specific flexibility. SIG’s proven internal recoil system offers reduced recoil and a compact platform. To enhance accuracy, the MCX VIRTUS features the new Matchlite™ Duo trigger for crisp, clean feel. Free-floating M-LOK handguards are available in four lengths. Ambidextrous, AR-style controls and a folding and adjustable stock enable the MCX VIRTUS Patrol to be tailored to any shooter. Available in Stealth Gray and FDE and built with the highest-quality components, the MCX VIRTUS is the apex predator of the carbine world.

SIG Sauer MCX Virtus For Sale

SIG Sauer MCX Virtus Specs

1 Brand

2 Category

Technical Data


.300 AAC Blackout






Flat Dark Earth

SIG Sauer MCX Virtus Features

The SIG Sauer MCX Virtus is available as a rifle and a pistol and acts as the next evolution of the AR15.  Unlike the AR platform that dumps carbon inside of the bolt with its internal-piston action, the MCX uses a short-stroke gas piston action where the recoil spring assembly sits above the bolt cavity in order to allow for a folding stock.  Both in a rifle and pistol configuration (16.5 and 10.5 inch barrel lengths), the MCX has a free-floating handguard that offers a continued top rail for mounting any optics setup.

SIG Sauer MCX Virtus Ballistics

.300 AAC Blackout Ballistic Data
Range (Yards) Drop (inches) Velocity Energy Wind drift (inches) Time (milliseconds)
0 0 0 0 0 0
50 0 0 0 0 0
100 0 0 0 0 0
150 0 0 0 0 0
200 0 0 0 0 0
250 0 0 0 0 0
300 0 0 0 0 0
350 0 0 0 0 0
400 0 0 0 0 0
450 0 0 0 0 0
500 0 0 0 0 0

SIG Sauer MCX Virtus Capacity

The MCX Virtus is available in 5.56x45mm NATO (.223 Remington) as well as .300 Blackout and feeds from any AR15 pattern magazine.  This gives the MCX a standard magazine capacity of 30 rounds, however the smaller 5, 10 and 20 round mags will work, as will the 40, 60 and 100 round magazines.  While any 5.56/.223 round will work in any magazine, some mags won’t actually properly load .300 Blackout, especially the quad-stack and drum magazines.

The MCX has an unloaded weight of 7.9 pounds and measures 35.5 inches with the stock out and fully collapsed.  Though its overall length is that of a typical AR15, it weighs approximately 1 extra pound due to its thicker receivers and handguard.  While this does reduce its mobility, the trade-off is a softer felt-recoil impulse.  Because the rifle has a folding stock, it is much easier to navigate tighter spaces than a standard AR.

SIG Sauer MCX Virtus Mobility


SIG Sauer MCX Virtus Ergonomics

The MCX has identical operating controls to the AR15 with the added improvements of fully-ambidextrous controls.  Any stock can be added to this rifle with an adapter, though the factory-installed adjustable/folding stock offers a thin yet comfortable cheek weld as well as solid support.  The handguard has a somewhat square and boxy cross section that might take some getting used to, though it’s full-length which allows the user to hold it anywhere and add any forward attachments.

SIG Sauer MCX Virtus Fit & Finish

The MCX is built on a billet receiver set made of the typical 7075-T6 aluminum, but that’s not the most interesting part.  Unlike an AR15, the MCX has a curtailed bolt carrier and modified AR bolt that allows the assembly to fit in the rifle without the need for a buffer tube.  The recoil springs sit over the bolt assembly like a double-spring AK bolt.  Combining this with a short-stroke gas piston, the MCX runs both cooler and cleaner which improves the longevity of the rifle.

Fit and Finish

SIG Sauer MCX Virtus Comparisons

How much is a SIG Sauer MCX Virtus worth?

In 2024 a new or used SIG Sauer MCX Virtus value varies depending on supply and demand. In the last 12 months there is great demand for a SIG Sauer MCX Virtus and most rifles. The Price for a SIG Sauer MCX Virtus has increased in cost by $0.00 in 2024 compared to 2023.

Estimated New and Used Values for a SIG Sauer MCX Virtus Values are based on a basic model with no options or colors.

Condition Trade-In Private Party Dealer
New In box $1,544.82 $2,020.14 $2,376.64
Excellent $1,425.98 $1,901.31 $2,138.98
Very Good $1,307.15 $1,901.31 $2,138.98
Good $1,188.32 $1,782.48 $2,020.14
Fair $831.82 $1,544.82 $1,901.31
Poor $594.16 $1,188.32 N/A

Gun Value Conditions explained:

New in box - 100% condition in unopened box. Excellent - 95%+ condition with or without box.

Very Good - 90% - 95% condition (all parts/finish should be original).

Good - 80-90% condition (all parts/finish should be original).

Fair - 30% - 80% condition, parts, and finish may or may not be original. Must function properly and shoot.

Poor - under 30% condition. Firearm has severe wear and tear, does not function, or is damaged.

Guncritic Icon

Want To Sell Your SIG Sauer MCX Virtus?

Quick Cash Offer

  • We make you an quick cash offer online

  • We find the dealer that offers you the most money

  • Get cash for your gun or do a trade in

How We Compare to Selling It Yourself

We take all the hassle out of selling your gun.

Speed Icon

Save Time

Quick Cash Offer

Get your cash offer in minutes

Selling it Yourself

Can take months to sell your gun privately

Buyer Icon


Quick Cash Offer

Trusted retailers will pay you for your gun

Selling it Yourself

You don't know who you're selling to, or if they'll rip you off

Price Icon


Quick Cash Offer

I'ts totally free to get a cash offer on your gun

Selling it Yourself

It costs money to place ads to sell your gun, and it takes a lot of time

Diffuculty Icon


Quick Cash Offer

Easy online paperwork and registration process for your safe and legal payout

Selling it Yourself

You have to trust the buyer to pay you, and trust that you're following the law

Rate And Review

SIG Sauer MCX Virtus Q & A

There are no questions related to SIG Sauer MCX Virtus


SIG Sauer MCX Virtus Problems

There are no problems related to SIG Sauer MCX Virtus


Related Products